Officers are encouraging youngsters to only trick or treat at houses they know, ideally with an adult supervising.
Famous Cop Cars On Show In Portsmouth
Famous cars from police shows such as Starsky and Hutch and the Sweeney are in Portsmouth today.
The event, called Policing through the ages' is being held at Gunwharf Quays and is showcasing famous police vehicles along with equipment dating back to the 1940s.
Hampshire Constabulary units that will be there include the roads policing unit, marine unit and the dog unit. Police horses from Thames Valley Police will be on patrol as well as other exhibits from surrounding forces. There is also a helicopter fly past planned by Dorset Police.
Cars from TV shows including Starsky and Hutch, Knight Rider and The Sweeney will be parked up for visitors to see along with Hampshire Constabulary's 'celebrity' transit van Ninah. The Hampshire Constabulary band will also be entertaining the crowds, performing three sets throughout the day.
Also among the attractions are the 'Cops and Doughnuts' police team from Clare, Michigan, USA. They will be giving away their famous 'Cops Coffee', turning the Gunwharf Quays police station into their own 'substation'.
The Queen, Duke of Edinburgh, Prince of Wales, Duchess of Cornwall visit Poundbury in Dorset.
South Central Ambulance Service hopes it'll help save lives, of people suffering cardiac arrest.
As the evenings start getting darker, officers are urging riders to use lights and wear reflective clothing.
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